AD 2021-23-17
Unsafe Condition
Cracks have been reported at different positions on two affected propeller hubs, which could lead to in-flight propeller detachment, possibly resulting in damage to the airplane and/or injury to persons on the ground.
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Required Actions
Amend the existing AFM by inserting abnormal propeller vibration instructions, visually inspect and NDT inspect the propeller hub, and, depending on the results of the inspections, replace the propeller hub with a part eligible for installation.
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Compliance Time
Before further flight
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Affected Aircraft
Hoffmann GmbH & Co. KG model HO-V 72 propellers
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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